EP1234567A2 - Filling material based on particulate composite - Google Patents
Filling material based on particulate composite Download PDFInfo
- Publication number
- EP1234567A2 EP1234567A2 EP02003250A EP02003250A EP1234567A2 EP 1234567 A2 EP1234567 A2 EP 1234567A2 EP 02003250 A EP02003250 A EP 02003250A EP 02003250 A EP02003250 A EP 02003250A EP 1234567 A2 EP1234567 A2 EP 1234567A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- weight
- composition according
- filler
- glass powder
- composite material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000011238 particulate composite Substances 0.000 title claims abstract description 22
- 239000000463 material Substances 0.000 title claims description 28
- 238000011049 filling Methods 0.000 title claims description 9
- 239000002245 particle Substances 0.000 claims abstract description 52
- 239000005548 dental material Substances 0.000 claims abstract description 23
- 239000000945 filler Substances 0.000 claims description 80
- 239000000203 mixture Substances 0.000 claims description 76
- 239000011521 glass Substances 0.000 claims description 34
- 239000000843 powder Substances 0.000 claims description 30
- 239000000178 monomer Substances 0.000 claims description 23
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 16
- 239000011230 binding agent Substances 0.000 claims description 14
- 239000002241 glass-ceramic Substances 0.000 claims description 12
- 239000010453 quartz Substances 0.000 claims description 11
- 239000011256 inorganic filler Substances 0.000 claims description 10
- 229910003475 inorganic filler Inorganic materials 0.000 claims description 10
- 239000000654 additive Substances 0.000 claims description 9
- 239000003505 polymerization initiator Substances 0.000 claims description 9
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 7
- 229910052788 barium Inorganic materials 0.000 claims description 7
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims description 7
- XASAPYQVQBKMIN-UHFFFAOYSA-K ytterbium(iii) fluoride Chemical compound F[Yb](F)F XASAPYQVQBKMIN-UHFFFAOYSA-K 0.000 claims description 7
- 229910052712 strontium Inorganic materials 0.000 claims description 4
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 claims description 4
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 3
- 239000003479 dental cement Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 239000002131 composite material Substances 0.000 description 32
- 238000006116 polymerization reaction Methods 0.000 description 20
- 239000003999 initiator Substances 0.000 description 12
- QUZSUMLPWDHKCJ-UHFFFAOYSA-N bisphenol A dimethacrylate Chemical compound C1=CC(OC(=O)C(=C)C)=CC=C1C(C)(C)C1=CC=C(OC(=O)C(C)=C)C=C1 QUZSUMLPWDHKCJ-UHFFFAOYSA-N 0.000 description 9
- 238000009826 distribution Methods 0.000 description 7
- 235000012239 silicon dioxide Nutrition 0.000 description 7
- WOBHKFSMXKNTIM-UHFFFAOYSA-N Hydroxyethyl methacrylate Chemical compound CC(=C)C(=O)OCCO WOBHKFSMXKNTIM-UHFFFAOYSA-N 0.000 description 5
- 239000002318 adhesion promoter Substances 0.000 description 5
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 4
- 150000001412 amines Chemical class 0.000 description 4
- 235000019400 benzoyl peroxide Nutrition 0.000 description 4
- 239000007795 chemical reaction product Substances 0.000 description 4
- 238000000227 grinding Methods 0.000 description 4
- 239000004342 Benzoyl peroxide Substances 0.000 description 3
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- MKVYSRNJLWTVIK-UHFFFAOYSA-N ethyl carbamate;2-methylprop-2-enoic acid Chemical class CCOC(N)=O.CC(=C)C(O)=O.CC(=C)C(O)=O MKVYSRNJLWTVIK-UHFFFAOYSA-N 0.000 description 3
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000011236 particulate material Substances 0.000 description 3
- 229920002818 (Hydroxyethyl)methacrylate Polymers 0.000 description 2
- ATOUXIOKEJWULN-UHFFFAOYSA-N 1,6-diisocyanato-2,2,4-trimethylhexane Chemical compound O=C=NCCC(C)CC(C)(C)CN=C=O ATOUXIOKEJWULN-UHFFFAOYSA-N 0.000 description 2
- VNQXSTWCDUXYEZ-UHFFFAOYSA-N 1,7,7-trimethylbicyclo[2.2.1]heptane-2,3-dione Chemical compound C1CC2(C)C(=O)C(=O)C1C2(C)C VNQXSTWCDUXYEZ-UHFFFAOYSA-N 0.000 description 2
- XFCMNSHQOZQILR-UHFFFAOYSA-N 2-[2-(2-methylprop-2-enoyloxy)ethoxy]ethyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCOCCOC(=O)C(C)=C XFCMNSHQOZQILR-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 2
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 2
- YIVJZNGAASQVEM-UHFFFAOYSA-N Lauroyl peroxide Chemical compound CCCCCCCCCCCC(=O)OOC(=O)CCCCCCCCCCC YIVJZNGAASQVEM-UHFFFAOYSA-N 0.000 description 2
- JLTDJTHDQAWBAV-UHFFFAOYSA-N N,N-dimethylaniline Chemical compound CN(C)C1=CC=CC=C1 JLTDJTHDQAWBAV-UHFFFAOYSA-N 0.000 description 2
- AMFGWXWBFGVCKG-UHFFFAOYSA-N Panavia opaque Chemical compound C1=CC(OCC(O)COC(=O)C(=C)C)=CC=C1C(C)(C)C1=CC=C(OCC(O)COC(=O)C(C)=C)C=C1 AMFGWXWBFGVCKG-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- ISAOCJYIOMOJEB-UHFFFAOYSA-N benzoin Chemical compound C=1C=CC=CC=1C(O)C(=O)C1=CC=CC=C1 ISAOCJYIOMOJEB-UHFFFAOYSA-N 0.000 description 2
- 229930006711 bornane-2,3-dione Natural products 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- VFHVQBAGLAREND-UHFFFAOYSA-N diphenylphosphoryl-(2,4,6-trimethylphenyl)methanone Chemical compound CC1=CC(C)=CC(C)=C1C(=O)P(=O)(C=1C=CC=CC=1)C1=CC=CC=C1 VFHVQBAGLAREND-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- STVZJERGLQHEKB-UHFFFAOYSA-N ethylene glycol dimethacrylate Substances CC(=C)C(=O)OCCOC(=O)C(C)=C STVZJERGLQHEKB-UHFFFAOYSA-N 0.000 description 2
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 150000002734 metacrylic acid derivatives Chemical class 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- GYVGXEWAOAAJEU-UHFFFAOYSA-N n,n,4-trimethylaniline Chemical compound CN(C)C1=CC=C(C)C=C1 GYVGXEWAOAAJEU-UHFFFAOYSA-N 0.000 description 2
- FZUGPQWGEGAKET-UHFFFAOYSA-N parbenate Chemical compound CCOC(=O)C1=CC=C(N(C)C)C=C1 FZUGPQWGEGAKET-UHFFFAOYSA-N 0.000 description 2
- 150000002978 peroxides Chemical class 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 239000011505 plaster Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- MFEWNFVBWPABCX-UHFFFAOYSA-N 1,1,2,2-tetraphenylethane-1,2-diol Chemical compound C=1C=CC=CC=1C(C(O)(C=1C=CC=CC=1)C=1C=CC=CC=1)(O)C1=CC=CC=C1 MFEWNFVBWPABCX-UHFFFAOYSA-N 0.000 description 1
- XMAWUPHYEABFDR-UHFFFAOYSA-N 1,2-bis(4-chlorophenyl)ethane-1,2-dione Chemical compound C1=CC(Cl)=CC=C1C(=O)C(=O)C1=CC=C(Cl)C=C1 XMAWUPHYEABFDR-UHFFFAOYSA-N 0.000 description 1
- YNANGXWUZWWFKX-UHFFFAOYSA-N 1,2-bis(4-methoxyphenyl)ethane-1,2-dione Chemical compound C1=CC(OC)=CC=C1C(=O)C(=O)C1=CC=C(OC)C=C1 YNANGXWUZWWFKX-UHFFFAOYSA-N 0.000 description 1
- HSOOIVBINKDISP-UHFFFAOYSA-N 1-(2-methylprop-2-enoyloxy)butyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC(CCC)OC(=O)C(C)=C HSOOIVBINKDISP-UHFFFAOYSA-N 0.000 description 1
- FWTGTVWNYRCZAI-UHFFFAOYSA-N 1-(2-methylprop-2-enoyloxy)decyl 2-methylprop-2-enoate Chemical compound CCCCCCCCCC(OC(=O)C(C)=C)OC(=O)C(C)=C FWTGTVWNYRCZAI-UHFFFAOYSA-N 0.000 description 1
- KQMPMWGWJLNKPC-UHFFFAOYSA-N 1-(2-methylprop-2-enoyloxy)dodecyl 2-methylprop-2-enoate Chemical compound CCCCCCCCCCCC(OC(=O)C(C)=C)OC(=O)C(C)=C KQMPMWGWJLNKPC-UHFFFAOYSA-N 0.000 description 1
- OGBWMWKMTUSNKE-UHFFFAOYSA-N 1-(2-methylprop-2-enoyloxy)hexyl 2-methylprop-2-enoate Chemical compound CCCCCC(OC(=O)C(C)=C)OC(=O)C(C)=C OGBWMWKMTUSNKE-UHFFFAOYSA-N 0.000 description 1
- NLPBRTBBFUOESW-UHFFFAOYSA-N 1-trimethoxysilylpropyl 2-methylprop-2-enoate Chemical compound CO[Si](OC)(OC)C(CC)OC(=O)C(C)=C NLPBRTBBFUOESW-UHFFFAOYSA-N 0.000 description 1
- LRZPQLZONWIQOJ-UHFFFAOYSA-N 10-(2-methylprop-2-enoyloxy)decyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCCCCCCCCCOC(=O)C(C)=C LRZPQLZONWIQOJ-UHFFFAOYSA-N 0.000 description 1
- RVWUHFFPEOKYLB-UHFFFAOYSA-N 2,2,6,6-tetramethyl-1-oxidopiperidin-1-ium Chemical compound CC1(C)CCCC(C)(C)[NH+]1[O-] RVWUHFFPEOKYLB-UHFFFAOYSA-N 0.000 description 1
- HWSSEYVMGDIFMH-UHFFFAOYSA-N 2-[2-[2-(2-methylprop-2-enoyloxy)ethoxy]ethoxy]ethyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCOCCOCCOC(=O)C(C)=C HWSSEYVMGDIFMH-UHFFFAOYSA-N 0.000 description 1
- LTHJXDSHSVNJKG-UHFFFAOYSA-N 2-[2-[2-[2-(2-methylprop-2-enoyloxy)ethoxy]ethoxy]ethoxy]ethyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCOCCOCCOCCOC(=O)C(C)=C LTHJXDSHSVNJKG-UHFFFAOYSA-N 0.000 description 1
- RUMACXVDVNRZJZ-UHFFFAOYSA-N 2-methylpropyl 2-methylprop-2-enoate Chemical compound CC(C)COC(=O)C(C)=C RUMACXVDVNRZJZ-UHFFFAOYSA-N 0.000 description 1
- IXXLKTZOCSRXEM-UHFFFAOYSA-N 3-(n-methylanilino)propanenitrile Chemical compound N#CCCN(C)C1=CC=CC=C1 IXXLKTZOCSRXEM-UHFFFAOYSA-N 0.000 description 1
- XDLMVUHYZWKMMD-UHFFFAOYSA-N 3-trimethoxysilylpropyl 2-methylprop-2-enoate Chemical compound CO[Si](OC)(OC)CCCOC(=O)C(C)=C XDLMVUHYZWKMMD-UHFFFAOYSA-N 0.000 description 1
- DBCAQXHNJOFNGC-UHFFFAOYSA-N 4-bromo-1,1,1-trifluorobutane Chemical compound FC(F)(F)CCCBr DBCAQXHNJOFNGC-UHFFFAOYSA-N 0.000 description 1
- -1 6-isocyanatohexyl Chemical group 0.000 description 1
- YYVYAPXYZVYDHN-UHFFFAOYSA-N 9,10-phenanthroquinone Chemical compound C1=CC=C2C(=O)C(=O)C3=CC=CC=C3C2=C1 YYVYAPXYZVYDHN-UHFFFAOYSA-N 0.000 description 1
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 1
- QSJXEFYPDANLFS-UHFFFAOYSA-N Diacetyl Chemical group CC(=O)C(C)=O QSJXEFYPDANLFS-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 241001620634 Roger Species 0.000 description 1
- 244000028419 Styrax benzoin Species 0.000 description 1
- 235000000126 Styrax benzoin Nutrition 0.000 description 1
- 235000008411 Sumatra benzointree Nutrition 0.000 description 1
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
- OKKRPWIIYQTPQF-UHFFFAOYSA-N Trimethylolpropane trimethacrylate Chemical compound CC(=C)C(=O)OCC(CC)(COC(=O)C(C)=C)COC(=O)C(C)=C OKKRPWIIYQTPQF-UHFFFAOYSA-N 0.000 description 1
- 239000012963 UV stabilizer Substances 0.000 description 1
- 239000004837 Ultraviolet (UV) light curing adhesive Substances 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 229960002130 benzoin Drugs 0.000 description 1
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 1
- 239000012965 benzophenone Substances 0.000 description 1
- 125000003236 benzoyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C(*)=O 0.000 description 1
- AOJOEFVRHOZDFN-UHFFFAOYSA-N benzyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCC1=CC=CC=C1 AOJOEFVRHOZDFN-UHFFFAOYSA-N 0.000 description 1
- OHJMTUPIZMNBFR-UHFFFAOYSA-N biuret Chemical compound NC(=O)NC(N)=O OHJMTUPIZMNBFR-UHFFFAOYSA-N 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000011246 composite particle Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- OIWOHHBRDFKZNC-UHFFFAOYSA-N cyclohexyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC1CCCCC1 OIWOHHBRDFKZNC-UHFFFAOYSA-N 0.000 description 1
- FOTKYAAJKYLFFN-UHFFFAOYSA-N decane-1,10-diol Chemical compound OCCCCCCCCCCO FOTKYAAJKYLFFN-UHFFFAOYSA-N 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- MCPKSFINULVDNX-UHFFFAOYSA-N drometrizole Chemical compound CC1=CC=C(O)C(N2N=C3C=CC=CC3=N2)=C1 MCPKSFINULVDNX-UHFFFAOYSA-N 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- ZMJOQTILTVQJJE-UHFFFAOYSA-N ethenol;2-methylprop-2-enoic acid Chemical compound OC=C.CC(=C)C(O)=O ZMJOQTILTVQJJE-UHFFFAOYSA-N 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 150000002222 fluorine compounds Chemical class 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 235000019382 gum benzoic Nutrition 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 229910003471 inorganic composite material Inorganic materials 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000007885 magnetic separation Methods 0.000 description 1
- DYFFAVRFJWYYQO-UHFFFAOYSA-N n-methyl-n-phenylaniline Chemical compound C=1C=CC=CC=1N(C)C1=CC=CC=C1 DYFFAVRFJWYYQO-UHFFFAOYSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- CSVRUJBOWHSVMA-UHFFFAOYSA-N oxolan-2-yl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC1CCCO1 CSVRUJBOWHSVMA-UHFFFAOYSA-N 0.000 description 1
- 239000011049 pearl Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000011941 photocatalyst Substances 0.000 description 1
- 229910052615 phyllosilicate Inorganic materials 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 239000011164 primary particle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000010526 radical polymerization reaction Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007151 ring opening polymerisation reaction Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
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- 238000003786 synthesis reaction Methods 0.000 description 1
- GJBRNHKUVLOCEB-UHFFFAOYSA-N tert-butyl benzenecarboperoxoate Chemical compound CC(C)(C)OOC(=O)C1=CC=CC=C1 GJBRNHKUVLOCEB-UHFFFAOYSA-N 0.000 description 1
- BWSZXUOMATYHHI-UHFFFAOYSA-N tert-butyl octaneperoxoate Chemical compound CCCCCCCC(=O)OOC(C)(C)C BWSZXUOMATYHHI-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/04—Nitro compounds
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/70—Preparations for dentistry comprising inorganic additives
- A61K6/71—Fillers
- A61K6/77—Glass
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
- A61K6/884—Preparations for artificial teeth, for filling teeth or for capping teeth comprising natural or synthetic resins
- A61K6/887—Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/284—Anaerobic digestion processes using anaerobic baffled reactors
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/075—Ethers or acetals
- A61K31/08—Ethers or acetals acyclic, e.g. paraformaldehyde
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K33/00—Medicinal preparations containing inorganic active ingredients
- A61K33/02—Ammonia; Compounds thereof
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0913—Carbonaceous raw material
- C10J2300/0916—Biomass
- C10J2300/0923—Sludge, e.g. from water treatment plant
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/16—Integration of gasification processes with another plant or parts within the plant
- C10J2300/169—Integration of gasification processes with another plant or parts within the plant with water treatments
Definitions
- the invention relates to fillers based on particulate Composite materials that have a defined grain size distribution have and only a small proportion of fine-grained Contain particles.
- Modern dental materials usually contain one essential component is a liquid, polymerizable binder in the form of monomers or monomer mixtures. It is known that usually in the polymerization of such binders a more or less pronounced volume contraction takes place (see R.R. Sadhir, R.M. Luck, Expanding Monomers - Synthesis, characterization and application; CRC Press, Boca Raton 1992, pages 3ff).
- the shrinking is on training covalent bonds between the monomer molecules in the Polymerization attributed, causing the distance between the Molecules is decreased. Be in the unpolymerized state the molecules are mostly held together by Van der Waals forces, which is a larger intermolecular distance from Consequence.
- the polymerization shrinkage has an effect on the production of molded parts very detrimental to dimensional stability and the mechanical properties of the molded body.
- adhesives and adhesive bonds affect polymerization shrinkage the adhesive properties and the bond strength, which at Dental materials the liability between restoration material and the natural tooth structure deteriorates. It comes to Formation of gaps, which is the formation of secondary caries favor.
- the particle size comes into play a special meaning too.
- Large particle diameter result in materials with poor polishability and more unacceptable Abrasion, while finely divided fillers are strong Show thickening effect, which increases the monomer requirement and as a result, the polymerization shrinkage is increased.
- the incorporation of the Filler difficult and the maximum amount of filler limited.
- tooth filling compounds which as Filler glass beads with a particle size in the range of 5 to 100 ⁇ m included.
- As a gap filler are additional Glass fibers used.
- the pearls are said to be due to their Spherical shape an optimal breaking strength and a low Ensure abrasion.
- the color of the masses should change Hardening itself to the color of the natural tooth material to adjust.
- DE 27 05 220 A1 suggests transparent dental materials high compressive strength, in which a finely divided filler with such a grain size distribution that 70 - 95% the particles have a grain size of 0.7 to 25 ⁇ m and 5 - 30% of the Particles have a grain size of 0.2 to 0.7 microns.
- the filler can contain up to 5% by weight of particles with a diameter smaller than 0.2 ⁇ m.
- the average grain size of the finely divided fillers is 1 - 5 ⁇ m specified. According to the examples, raw ⁇ -quartz is heated and ground according to a certain method.
- EP 0 475 239 A2 discloses dental materials which are known as Filler is a mixture of amorphous, spherical particles Silicon dioxide and up to 20 mol% of an oxide of at least one Elements of groups I, II, III and IV of the periodic table a refractive index from 1.50 to 1.58 and with an average Primary particle size from 0.1 to 1.0 ⁇ m, and quartz, Glass ceramic or glass powder or their mixtures with one Refractive index from 1.50 to 1.58 and with an average Particle size from 0.5 to 5.0 microns included.
- the materials are characterized by high transparency and good polishability out.
- US 5,356,951 discloses dental materials used as fillers a mixture of an organic-inorganic composite filler with an average particle size of 5 to 50 microns, glass powder with a maximum particle size of 10 ⁇ m and a medium one Particle size from 0.1 to 5 ⁇ m and a finely divided filler with a particle size of 0.01 to 0.04 ⁇ m.
- the composite filler is filled with glass powder, one maximum particle size of 10 ⁇ m and an average particle size from 0.1 to 5 ⁇ m.
- the materials should go through a smooth surface, low polymerization shrinkage and distinguish improved physical properties.
- dental materials that are known as Filler contain an organic-inorganic composite material can, which has an average particle size of 5 to 50 microns and in turn with an ultra-fine inorganic filler an average particle size of 0.01 to 0.04 microns is filled.
- the dental materials are applied using pressure and heat polymerized and then by milling to dental restorations further processed. These are said to be characterized by good mechanical Excellent properties and free of unpolymerized monomer his.
- EP 0 983 762 A1 discloses dental materials which are known as Filler is a mixture of organic-inorganic composite filler with an average particle size of 5 to 50 ⁇ m, particulate Filler with an average particle size of 20 nm or less and possibly glass powder with a maximum particle size of 5 ⁇ m and an average particle size of 0.5 to 2 ⁇ m.
- the composite filler is made by curing a mixture a particulate filler with a medium particle size of 20 nm or less and a methacrylate or acrylate monomer with a viscosity of 60 cP or more and pulverizing the made hardened mixture.
- the materials are supposed to due to good polishability and good mechanical properties distinguish and a smoothness corresponding to the natural tooth and have transparency.
- the invention is therefore based on the object of polymerizable To provide compositions that are low Polymerization shrinkage and good other properties such as Have transparency and polishability.
- This task is accomplished through polymerizable compositions solved a new filler based on contain particulate composite material.
- This composite filler has an average particle size of 20 to 50 microns and contains a maximum of 10% by weight of particles with a grain size of ⁇ 10 microns. The percentage refers to the mass of the composite filler.
- Under a composite material is a material on the Basis of polymerizable organic binder and inorganic Understood filler.
- composite fillers are preferred that have one if possible contain a small proportion of fine particulate material, in particular at most 8% by weight and particularly preferably at most 6 % By weight of particles with a size of ⁇ 10 ⁇ m. More preferred are composite fillers with an average particle size of 30 to 40 ⁇ m.
- the maximum particle size of the composite filler is preferably 70 ⁇ m, i.e. the material contains less than 5% by weight, particularly preferably less than 1% by weight of particles with a Size of more than 70 ⁇ m.
- the average particle size is used indicated, understood the number average. This follows from the frequency distribution after classification.
- Composite materials suitable according to the invention as composite fillers can be mixed, for example, by organic binder, filler and optionally polymerization initiator, Harden and then grind the mixture produce. The regrind is classified, if necessary Obtain filler with the desired grain size distribution.
- the grinding can take place in conventional mills, for example in a ball mill, air jet mill, impact mill or Vibration mill.
- the composite material can before the actual For example, grinding can be pre-broken in a cone crusher.
- the exemplary embodiments show that in the ordinary milling of Composite materials a significant proportion of fine particulate Material with a particle diameter of ⁇ 10 microns is formed. According to the invention, this is separated off, for example by Classification, such as current classification, classifying, wind classifying, if necessary in combination with electrostatic processes, flotation, Sedimentation, electrostatic or magnetic separation or Seven. Suitable procedures are described in Ullmann's Encyclopedia Technical Chemistry, Volume 2 (1988), Unit Operations.
- Binder especially ethylenically unsaturated, polymerizable Binders, e.g. Monomers, such as monofunctional or polyfunctional methacrylates, alone or in mixtures can be used.
- this Compounds come methyl methacrylate, isobutyl methacrylate, Cyclohexyl methacrylate, tetraethylene glycol dimethacrylate, triethylene glycol dimethacrylate, Diethylene glycol dimethacrylate, ethylene glycol dimethacrylate, Polyethylene glycol dimethacrylate, butanediol dimethacrylate, Hexanediol dimethacrylate, decanediol dimethacrylate, Dodecanediol dimethacrylate, bisphenol A dimethacrylate, trimethylolpropane trimethacrylate, 2,2-bis [4- (2-hydroxy-3-methacryloxypropoxy) phenyl] propane (Bis-GMA) as well as the reaction products Isocyanates, especially di- and / or triisocyanates and OH group-containing methacrylates in question.
- Bis-GMA 2,2-bis [4- (2-hydroxy-3-methacryloxypropoxy
- Examples of this are the reaction products of 1 mol of hexamethylene diisocyanate with 2 Moles of 2-hydroxyethylene methacrylate, from 1 mole of tri (6-isocyanatohexyl) biuret with 3 moles of 2-hydroxyethyl methacrylate and 1 mole 2,2,4-trimethylhexamethylene diisocyanate with 2 moles of 2-hydroxyethyl methacrylate, hereinafter referred to as urethane dimethacrylates become.
- the proportion of binder ranges between 10 and 80 % By weight based on the mass of the composite material, preferably 10 to 30% by weight.
- Particularly preferred monomers are urethane dimethacrylate (UDMA), i.e. the reaction product of 1 mole of 2,2,4-trimethylhexamethylene diisocyanate with 2 moles of 2-hydroxyethyl methacrylate, 1,10-decanediol di (meth) acrylate, Bisphenol A dimethacrylate, ethoxylated Bisphenol A dimethacrylate and mixtures of these monomers.
- UDMA urethane dimethacrylate
- the mixtures contain one to initiate the polymerization Polymerization initiator, for example an initiator for the radical polymerization.
- an initiator for the radical polymerization for example an initiator for the radical polymerization.
- Initiators can be cold, by light or preferably the mixtures be hot polymerizable.
- Peroxides such as dibenzoyl peroxide, dilauroyl peroxide, tert-butyl peroctoate or tert-butyl perbenzoate can be used, but also ⁇ , ⁇ '-azo-bis (isobutyroethyl ester), benzpinacol and 2,2'-dimethylbenzpinacol are suitable.
- initiators for the photopolymerization e.g. benzophenone and its derivatives, as well as benzoin and its derivatives become.
- Other preferred photoinitiators are ⁇ -diketones, such as 9,10-phenanthrenequinone, diacetyl, furil, anisil, 4,4'-dichlorobenzil and 4,4'-dialkoxybenzil.
- Camphorquinone will used particularly preferably.
- UV photoinitiators can be used alone, in combination with a Initiator for visible light, an initiator for cold curing and / or an initiator used for hot curing become.
- Photoinitiators are preferably used together with a reducing agent used.
- reducing agents are amines such as cyanoethylmethylaniline, triethylamine, triethanolamine, N, N-dimethylaniline, N-methyldiphenylamine, N, N-dimethyl-sym.-xylidine and N, N-3,5-tetramethylaniline and 4-dimethylaminobenzoic acid ethyl ester.
- Radicals are used as initiators for cold polymerization supplying systems, e.g. Benzoyl or Lauroyl peroxide together with Amines such as N, N-dimethyl-sym.-xylidine or N, N-dimethyl-p-toluidine used.
- Amines such as N, N-dimethyl-sym.-xylidine or N, N-dimethyl-p-toluidine used.
- the initiators are usually used in an amount of 0.01 to 5 wt .-% based on the total mass of the mixture used.
- Quartz, Glass ceramic, glass powder or mixtures thereof preferably Glass powder and very particularly preferably barium glass powder and / or Strontium glass powder, the mean particle size of this Powder preferably in the range of 0.4 to 1.5 microns and in particular is in the range of 0.7 to 1.0 ⁇ m. Quartz, glass ceramic and / or glass powder are preferably used in an amount of 10 to 80 wt .-%, in particular 40 to 65 wt .-% based on the Total mass of the mixture used.
- the composite filler can be used to achieve fillers an increased radiopacity.
- the average particle size the radiopaque filler is preferably in the range from 100 to 300 nm, in particular 180 to 300 nm.
- X-ray opaque Fillers are suitable e.g. those described in DE 35 02 594 A1 Fluorides of rare earth metals, i.e. the trifluorides of elements 57 to 71. A particularly preferred one
- the filler is ytterbium fluoride, especially ytterbium trifluoride with an average particle size of about 300 nm.
- the amount of X-ray opaque filler is preferably 10 to 50% by weight, particularly preferably 20 to 30% by weight.
- Precipitated mixed oxides such as ZrO 2 / SiO 2
- Mixed oxides with a particle size of 200 to 300 nm and in particular about 200 nm are preferred.
- the mixed oxide particles are preferably spherical and have a uniform size.
- the mixed oxides preferably have a refractive index of 1.52 to 1.55.
- the mixed oxides can be used as the sole filler or in combination with other fillers.
- the precipitated mixed oxide is preferably used in an amount of 20 to 90% by weight, particularly preferably 25 to 75% by weight and very particularly preferably 40 to 75% by weight.
- the fillers are used to improve adhesion between Filler and organic matrix preferably silanized.
- an adhesion promoter ⁇ -methacryloxypropyltrimethoxysilane is particularly suitable.
- the amount of adhesion promoter used is determined according to the type and BET surface area of the filler.
- Additives such as stabilizers and polymerization inhibitors contain. These are preferred in an amount of 0.01 to 2 % By weight used.
- the total amount of inorganic filler is preferably in Range from 20 to 90% by weight, in particular 60 to 88% by weight based on the total mass of the composite filler.
- compositions can be one of the components (c1), (c2) or (c3) or a mixture thereof as a filler.
- Compositions containing a filler of the type are preferred (c1) contained, alone or particularly preferably in combination with one of the components (c2) to (c3).
- the composite particles After hardening, grinding and classifying, the composite particles preferably with a suitable adhesion promoter treated. This reacts with the free surfaces of the Filler of the composite material that occurs when grinding the composite are exposed, thus improving the liability between Filler and organic matrix.
- a suitable adhesion promoter they are preferred silanes mentioned above.
- the particulate composite materials according to the invention are suitable are particularly suitable as fillers for polymerizable compositions, i.e. Compositions in addition to the particulate Composite material at least one polymerizable monomer and / or Prepolymer and at least one polymerization initiator contain.
- the proportion of the particulate composite material lies preferably in the range from 20 to 90% by weight, particularly preferably 25 to 70% by weight and very particularly preferably 30 to 50% by weight.
- the amount of organic binder is preferably 10 to 80 wt .-%, particularly preferably 10 to 30 wt .-%, the amount of Initiator 0.01 to 5 wt .-%, in particular 0.1 to 1 wt .-%.
- composite fillers with a density of 1.5 to 2.5 g / cm 3 , in particular 1.8 to 2.2 g / cm 3, are preferred.
- the relatively low density causes a high proportion of filler in the polymerizable composition and thus brings about an additional reduction in the polymerization shrinkage.
- the polymerizable contain Compositions preferably further additional particulate inorganic filler, in particular quartz, glass ceramic, glass powder or mixtures thereof, particularly preferably glass powder, very particularly preferably barium glass powder and / or strontium glass powder.
- the average particle size of the quartz, glass ceramic and / or glass powder is preferably in the range from 0.4 to 2 ⁇ m, particularly preferably 0.4 to 1.5 ⁇ m and very particularly preferably 0.7 to 1.0 ⁇ m.
- the share of quartz, glass ceramic and / or glass powder is preferably 20 to 70% by weight, particularly preferably 25 to 50% by weight and very particularly preferably 30 to 40 wt .-% based on the total mass of the composition.
- compositions can also contain one of the above-mentioned mixed oxides and / or one of the above-mentioned fillers for increasing the X-ray opacity, such as ytterbium trifluoride.
- the mixed oxide is preferably used in an amount of 20 to 70% by weight, the proportion of the radiopaque filler is preferably in the range from 1 to 10% by weight, particularly preferably from 1 to 5% by weight.
- the particle size of the X-ray opaque filler is preferably in the range from 100 to 300 nm, in particular 180 to 300 nm.
- Preferred mixed oxides are precipitated SiO 2 / ZrO 2 mixed oxides, which preferably have a particle size of 200 to 300 nm and in particular approximately 200 nm.
- compositions for adjusting the rheological behavior an organically modified layered silicate contain.
- the layered silicate is preferred in one Quantity from 0.05 to 5% by weight, particularly preferably 0.1 to 1% by weight used.
- the sum of the proportions of the radiopaque filler and the layered silicate is preferably at most 5% by weight.
- the total amount of additional inorganic filler polymerizable composition is preferably in the range from 0.05 to 85% by weight, in particular 0.1 to 56% by weight.
- the polymerizable one Composition essentially free of filler with a Particle size of ⁇ 100 nm.
- the inorganic filler is preferably treated with an adhesion promoter, for example silanized.
- the polymerizable compositions can be conventional Contain additives and additives, preferably in one Amount from 0.01 to 2% by weight.
- organic binders Particularly suitable as organic binders, polymerization initiators, additional fillers and additives are the substances described above as components of the composite filler.
- HEMA hydroxyethyl methacrylate
- Additives come in addition to the above materials Accelerators, dyes, pigments, UV absorbers, optical Brightener and lubricant into consideration. Compositions that contain a photoinitiator are preferred.
- the polymerizable compositions are particularly suitable as Dental materials.
- dental material Dental filling materials, materials for inlays or onlays, Dental cements, veneering materials for crowns and bridges, Materials for artificial teeth or other materials for prosthetic, preservative and preventive dentistry Roger that.
- the dental material according to the invention preferably serves as Dental filling material. Tooth filling materials are also called Two-component materials made after mixing harden cold. The composition is similar to that of the light-curing materials, only instead of the photocatalysts into which a paste e.g. Benzoyl peroxide and in the other paste e.g. N, N-dimethyl-p-toluidine incorporated. By mixing, for example the same parts of the two pastes are obtained with a filling material, which hardens in a few minutes.
- a paste e.g. Benzoyl peroxide
- thermosetting dental material that is used for manufacturing an inlay or artificial teeth can be used.
- an inlay in the patient's mouth is from an impression was taken from the cavity and a plaster model was made. The paste is placed in the cavity of the plaster model and that The whole is polymerized in a pressure pot under heat. The Inlay is removed, processed and then in the patient's mouth cemented into the cavity.
- the invention relates not only to the dental material, but also on finished parts, e.g. artificial Teeth, shells, inlays etc.
- a particulate composite material To produce a particulate composite material, the following components were mixed with one another in the stated amounts, and the mixture was cured at 100 ° C. for 24 hours, then roughly broken up and then ground in a ball mill. The average grain size was 21 ⁇ m. The fine fraction ( ⁇ 10 ⁇ m) and the coarse fraction (> 70 ⁇ m) were then removed using a classifier. Sifting shifts the average particle size to 37 ⁇ m. The grain size distribution before sifting is shown in Figure 1, the grain size distribution after sifting in Figure 2. Half of the material was then silanized with 5% by weight methacryloxypropyltrimethoxysilane and 2% by weight in water.
- Monomer mixture for the production of the composite filler 1,10-decanediol dimethacrylate 30% by weight Bisphenol A dimethacrylate 39.95% by weight Urethane dimethacrylate (UDMA) 27% by weight Benzoyl peroxide (50%) 3% by weight 2,6-di-tert-butyl-para-cresol 0.05% by weight
- Composite Filler monomer 20.5% by weight barium glass (average particle size 1.0 ⁇ m) 54.5% by weight ytterbium fluoride 25.0% by weight
- 39.5% by weight of the particulate composite material according to Example 1 was mixed with 39.5% by weight of barium glass powder with an average particle size of 1.5 ⁇ m, 15.5% by weight of a monomer mixture with the composition given below, and 2. 5% by weight of a bentone paste mixed to form a homogeneous paste.
- the bentone paste is composed of 12.5% by weight bentone (layered silicate) and 87.5% by weight of the monomer mixture.
- 0.1 g of the paste was fixed on a glass plate, overlaid with mercury and a displacement sensor was placed on the mercury in a floating manner.
- Example 2 It became analogous to Example 2, a light-curing dental material based on the filler according to Example 1, the However, the filler cannot be viewed through fine and coarse parts freed. Filler from the same batch was used. The Polymerization shrinkage was 1.9%.
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Abstract
Partikuläres Kompositmaterial mit einer mittleren Partikelgröße von 20 bis 50 µm und einem maximalen Gehalt an Partikeln mit einer Größe von < 10 µm von 10 Gew.-% und dessen Verwendung zur Herstellung von Dentalwerkstoffen. <IMAGE>Particulate composite material with an average particle size of 20 to 50 µm and a maximum content of particles with a size of <10 µm of 10% by weight and its use for the production of dental materials. <IMAGE>
Description
Die Erfindung betrifft Füllstoffe auf der Basis von partikelförmigen Kompositwerkstoffen, die eine definierte Korngrößenverteilung aufweisen und nur einen geringen Anteil feinkörniger Partikel enthalten.The invention relates to fillers based on particulate Composite materials that have a defined grain size distribution have and only a small proportion of fine-grained Contain particles.
Moderne Dentalwerkstoffe enthalten in der Regel als eine wesentliche Komponente ein flüssiges, polymerisierbares Bindemittel in Form von Monomeren oder Monomermischungen. Es ist bekannt, daß bei der Polymerisation solcher Bindemittel gewöhnlich eine mehr oder weniger stark ausgeprägte Volumenkontraktion stattfindet (vgl. R.R. Sadhir, R.M. Luck, Expanding Monomers - Synthesis, Characterization and Application; CRC Press, Boca Raton 1992, Seiten 3ff). Das Schrumpfen ist auf die Ausbildung kovalenter Bindungen zwischen den Monomermolekülen bei der Polymerisation zurückzuführen, wodurch der Abstand zwischen den Molekülen verringert wird. Im unpolymerisierten Zustand werden die Moleküle überwiegend durch Van der Waals-Kräfte zusammengehalten, welche einen größeren intermolekularen Abstand zur Folge haben. Modern dental materials usually contain one essential component is a liquid, polymerizable binder in the form of monomers or monomer mixtures. It is known that usually in the polymerization of such binders a more or less pronounced volume contraction takes place (see R.R. Sadhir, R.M. Luck, Expanding Monomers - Synthesis, characterization and application; CRC Press, Boca Raton 1992, pages 3ff). The shrinking is on training covalent bonds between the monomer molecules in the Polymerization attributed, causing the distance between the Molecules is decreased. Be in the unpolymerized state the molecules are mostly held together by Van der Waals forces, which is a larger intermolecular distance from Consequence.
Bei der Herstellung von Formteilen wirkt sich der Polymerisationsschrumpf sehr nachteilig auf die Dimensionsstabilität und die mechanischen Eigenschaften der Formkörper aus. Bei Adhäsiven und Klebeverbindungen beeinträchtigt der Polymerisationsschrumpf die Haftungseigenschaften und die Verbundfestigkeit, was bei Dentalmaterialien die Haftung zwischen Restaurationsmaterial und der natürlichen Zahnsubstanz verschlechtert. Es kommt zur Ausbildung von Spalten, welche die Bildung von Sekundärkaries begünstigen.The polymerization shrinkage has an effect on the production of molded parts very detrimental to dimensional stability and the mechanical properties of the molded body. For adhesives and adhesive bonds affect polymerization shrinkage the adhesive properties and the bond strength, which at Dental materials the liability between restoration material and the natural tooth structure deteriorates. It comes to Formation of gaps, which is the formation of secondary caries favor.
Zur Verringerung des Polymerisationsschrumpfes von Dentalmaterialien wurde der Einsatz von hochmolekularen Monomeren oder Präpolymeren, die Verwendung von Monomeren, die sich durch Ringöffnungspolymerisation polymerisieren lassen, die Zugabe von inerten, porösen oder expandierenden Füllstoffen oder Gas freisetzenden Systemen beschrieben.To reduce the polymerisation shrinkage of dental materials was the use of high molecular weight monomers or Prepolymers, the use of monomers that stand out Allow ring opening polymerization to polymerize, the addition of inert, porous or expanding fillers or gas releasing systems described.
Bei der Auswahl geeigneter Füllmaterialien kommt der Partikelgröße eine besondere Bedeutung zu. Große Partikeldurchmesser ergeben Materialien mit schlechter Polierbarkeit und inakzeptabler Abrasion, während feinteilige Füllmaterialien eine starke Verdickungswirkung zeigen, wodurch der Monomerbedarf erhöht und als Folge davon der Polymerisationsschrumpf vergrößert wird. Außerdem wird durch die hohe Viskosität das Einarbeiten des Füllstoffs erschwert und die maximale Füllstoffmenge begrenzt.When choosing suitable filling materials, the particle size comes into play a special meaning too. Large particle diameter result in materials with poor polishability and more unacceptable Abrasion, while finely divided fillers are strong Show thickening effect, which increases the monomer requirement and as a result, the polymerization shrinkage is increased. In addition, the incorporation of the Filler difficult and the maximum amount of filler limited.
Aus der DE-OS 14 92 040 sind Zahnfüllmassen bekannt, die als Füllstoff Glasperlen mit einer Teilchengröße im Bereich von 5 bis 100 µm enthalten. Als Zwischenraumfüllstoff werden zusätzlich Glasfasern eingesetzt. Die Perlen sollen auf Grund ihrer Kugelform eine optimale Bruchfestigkeit und eine geringe Abriebswirkung gewährleisten. Die Farbe der Massen soll sich beim Aushärten von selbst an die Farbe des natürlichen Zahnmaterials anpassen. From DE-OS 14 92 040 tooth filling compounds are known which as Filler glass beads with a particle size in the range of 5 to 100 µm included. As a gap filler are additional Glass fibers used. The pearls are said to be due to their Spherical shape an optimal breaking strength and a low Ensure abrasion. The color of the masses should change Hardening itself to the color of the natural tooth material to adjust.
Die DE 24 03 211 A1 offenbart Dentalwerkstoffe, in denen ausschließlich mikrofeine anorganische Füllstoffe (Mikrofüllstoffe) auf Siliciumdioxidbasis eingesetzt werden, deren Teilchengröße unter 700 nm liegt. Gemäß einer besonders bevorzugten Ausführungsform haben mindestens 50 Gew.-% des Füllstoffs eine Teilchengröße von 10 bis 400 nm. Man erhält überraschend Füllungsmaterialien mit guter Transparenz und Polierbarkeit sowie ausgezeichneten physikalischen Eigenschaften.DE 24 03 211 A1 discloses dental materials in which only micro-fine inorganic fillers (micro-fillers) on a silica basis, their particle size is below 700 nm. According to a particularly preferred embodiment have at least 50% by weight of the filler Particle size from 10 to 400 nm. Surprisingly, filling materials are obtained with good transparency and polishability as well excellent physical properties.
Die DE 27 05 220 A1 schlägt transparente Dentalwerkstoffe mit hoher Druckfestigkeit vor, in denen ein feinteiliger Füllstoff mit einer solchen Kornverteilung eingesetzt wird, daß 70 - 95 % der Teilchen eine Korngröße von 0,7 bis 25 µm und 5 - 30 % der Teilchen eine Korngröße von 0,2 bis 0,7 µm aufweisen. Darüber hinaus kann der Füllstoff in einer Menge bis zu 5 Gew.-% Teilchen mit einem geringeren Durchmesser als 0,2 µm enthalten. Die mittlere Korngröße der feinteiligen Füllstoffe wird mit 1 - 5 µm angegeben. Nach den Beispielen wird roher α-Quarz erhitzt und nach einer bestimmten Methode aufgemahlen.DE 27 05 220 A1 suggests transparent dental materials high compressive strength, in which a finely divided filler with such a grain size distribution that 70 - 95% the particles have a grain size of 0.7 to 25 µm and 5 - 30% of the Particles have a grain size of 0.2 to 0.7 microns. About that In addition, the filler can contain up to 5% by weight of particles with a diameter smaller than 0.2 µm. The average grain size of the finely divided fillers is 1 - 5 µm specified. According to the examples, raw α-quartz is heated and ground according to a certain method.
Die EP 0 475 239 A2 offenbart Dentalmaterialien, die als
Füllstoff eine Mischung aus amorphen, kugelförmigen Teilchen aus
Siliciumdioxid und bis zu 20 Mol-% eines Oxids mindestens eines
Elements der Gruppen I, II, III und IV des Periodensystems mit
einem Brechungsindex von 1,50 bis 1,58 und mit einer durchschnittlichen
Primärteilchengröße von 0,1 bis 1,0 µm, und Quarz-,
Glaskeramik- oder Glaspulver oder deren Mischungen mit einem
Brechungsindex von 1,50 bis 1,58 und mit einer durchschnittlichen
Teilchengröße von 0,5 bis 5,0 µm enthalten. Die Materialien
zeichnen sich durch eine hohe Transparenz und gute Polierbarkeit
aus.
Die US 5,356,951 offenbart Dentalwerkstoffe, die als Füllstoff eine Mischung aus einem organisch-anorganischen Kompositfüller mit einer mittleren Partikelgröße von 5 bis 50 µm, Glaspulver mit einer maximalen Partikelgröße von 10 µm und einer mittleren Partikelgröße von 0, 1 bis 5 µm und einem feinteiligen Füllstoff mit einer Partikelgröße von 0,01 bis 0,04 µm enthalten. Der Kompositfüller ist seinerseits mit Glaspulver gefüllt, das eine maximale Teilchengröße von 10 µm und eine mittlere Teilchengröße von 0,1 bis 5 µm aufweist. Die Werkstoffe sollen sich durch eine glatte Oberfläche, einen geringen Polymerisationsschrumpf und verbesserte physikalische Eigenschaften auszeichnen.US 5,356,951 discloses dental materials used as fillers a mixture of an organic-inorganic composite filler with an average particle size of 5 to 50 microns, glass powder with a maximum particle size of 10 µm and a medium one Particle size from 0.1 to 5 µm and a finely divided filler with a particle size of 0.01 to 0.04 µm. The For its part, the composite filler is filled with glass powder, one maximum particle size of 10 µm and an average particle size from 0.1 to 5 µm. The materials should go through a smooth surface, low polymerization shrinkage and distinguish improved physical properties.
Die DE 198 23 530 A1 offenbart Dentalmaterialien, die als Füllstoff ein organisch-anorganisches Verbundmaterial enthalten können, das eine mittlere Teilchengröße von 5 bis 50 µm aufweist und seinerseits mit einem ultrafeinen anorganischen Füllstoff mit einer mittleren Teilchengröße von 0,01 bis 0,04 µm gefüllt ist. Die Dentalmaterialien werden unter Anwendung von Druck und Hitze polymerisiert und dann durch Fräsen zu Dentalrestaurationen weiterverarbeitet. Diese sollen sich durch gute mechanische Eigenschaften auszeichnen und frei von unpolymerisiertem Monomer sein.DE 198 23 530 A1 discloses dental materials that are known as Filler contain an organic-inorganic composite material can, which has an average particle size of 5 to 50 microns and in turn with an ultra-fine inorganic filler an average particle size of 0.01 to 0.04 microns is filled. The dental materials are applied using pressure and heat polymerized and then by milling to dental restorations further processed. These are said to be characterized by good mechanical Excellent properties and free of unpolymerized monomer his.
Die EP 0 983 762 A1 offenbart Dentalmaterialien, die als
Füllstoff eine Mischung aus organisch-anorganischem Kompositfüller
mit einer mittleren Partikelgröße von 5 bis 50 µm, partikulärem
Füllstoff mit einer mittleren Partikelgröße von 20 nm oder
weniger und ggf. Glaspulver mit einer maximalen Partikelgröße von
5 µm und einer mittleren Partikelgröße von 0,5 bis 2 µm enthalten.
Der Kompositfüller wird durch Härten einer Mischung aus
einem partikulären Füllstoff mit einer mittleren Partikelgröße
von 20 nm oder weniger und einem Methacrylat- oder Acrylatmonomer
mit einer Viskosität von 60 cP oder mehr und Pulverisieren der
gehärteten Mischung hergestellt. Die Materialien sollen sich
durch gute Polierbarkeit und gute mechanische Eigenschaften
auszeichnen und eine dem natürlichen Zahn entsprechende Glätte
und Transparenz aufweisen.
Trotz der zahlreichen im Stand der Technik beschriebenen Dentalwerkstoffe und trotz der zum Teil beachtlichen Verbesserungen, die hinsichtlich bestimmter Materialeigenschaften erzielt wurden, weisen herkömmliche Dentalwerkstoffe meist immer noch einen Polymerisationsschrumpf von 2,3 bis 2,8 % auf. Es besteht daher nach wie vor ein Bedürfnis, den Polymerisationsschrumpf von Dentalmaterialien ohne Beeinträchtigung der übrigen Eigenschaften weiter zu reduzieren.Despite the numerous described in the prior art Dental materials and despite the sometimes considerable improvements, those regarding certain material properties conventional dental materials have always been achieved a polymerization shrinkage of 2.3 to 2.8%. It there is therefore still a need, the polymerization shrinkage of dental materials without affecting the rest Further reduce properties.
Der Erfindung liegt demnach die Aufgabe zugrunde, polymerisierbare Zusammensetzungen bereitzustellen, die einen geringen Polymerisationsschrumpf und gute sonstige Eigenschaften wie Transparenz und Polierbarkeit aufweisen.The invention is therefore based on the object of polymerizable To provide compositions that are low Polymerization shrinkage and good other properties such as Have transparency and polishability.
Diese Aufgabe wird durch polymerisierbare Zusammensetzungen gelöst, die einen neuartigen Füllstoff auf der Basis von partikulärem Kompositmaterial enthalten. Dieser Kompositfüller weist eine mittlere Partikelgröße von 20 bis 50 µm auf und enthält maximal 10 Gew.-% Partikel mit einer Korngröße von < 10 µm. Die Prozentangabe bezieht sich auf die Masse des Kompositfüllers. Unter einem Kompositmaterial wird ein Material auf der Basis von polymerisierbarem organischem Bindemittel und anorganischem Füllstoff verstanden.This task is accomplished through polymerizable compositions solved a new filler based on contain particulate composite material. This composite filler has an average particle size of 20 to 50 microns and contains a maximum of 10% by weight of particles with a grain size of <10 microns. The percentage refers to the mass of the composite filler. Under a composite material is a material on the Basis of polymerizable organic binder and inorganic Understood filler.
Es wurde überraschend gefunden, daß durch die Verwendung von Kompositfüller mit der angegebenen Korngrößenverteilung der Polymerisationsschrumpf polymerisierbarer Zusammensetzungen deutlich verringert werden kann. Zudem zeichnen sich die Zusammensetzungen nach dem Härten trotz ihres vergleichsweise hohen Gehalts an grobkörnigem Füllstoff durch gute Polierbarkeit, Oberflächenglätte und Abrasion aus.It has surprisingly been found that by using Composite filler with the specified grain size distribution Polymerization shrinkage of polymerizable compositions can be significantly reduced. In addition, the Compositions after curing despite their comparative high coarse-grain filler content due to good polishability, Surface smoothness and abrasion.
Grundsätzlich sind Kompositfüller bevorzugt, die einen möglichst geringen Anteil an feinpartikulärem Material enthalten, insbesondere maximal 8 Gew.-% und besonders bevorzugt maximal 6 Gew.-% Partikel mit einer Größe von < 10 µm. Weiter bevorzugt sind Kompositfüller mit einer mittleren Partikelgröße von 30 bis 40 µm. Die maximale Partikelgröße der Kompositfüller beträgt vorzugsweise 70 µm, d.h. das Material enthält weniger als 5 Gew.-%, besonders bevorzugt weniger als 1 Gew.-% Partikel mit einer Größe von mehr als 70 µm.In principle, composite fillers are preferred that have one if possible contain a small proportion of fine particulate material, in particular at most 8% by weight and particularly preferably at most 6 % By weight of particles with a size of <10 μm. More preferred are composite fillers with an average particle size of 30 to 40 µm. The maximum particle size of the composite filler is preferably 70 µm, i.e. the material contains less than 5% by weight, particularly preferably less than 1% by weight of particles with a Size of more than 70 µm.
Unter der mittleren Partikelgröße wird, wenn nicht anders angegeben, das Zahlenmittel verstanden. Dieses ergibt sich aus der Häufigkeitsverteilung nach dem Klassieren.If not different, the average particle size is used indicated, understood the number average. This follows from the frequency distribution after classification.
Erfindungsgemäß als Kompositfüller geeignete partikuläre Kompositmaterialien lassen sich beispielsweise durch Mischen von organischem Bindemittel, Füllstoff und gegebenenfalls Polymerisationsinitiator, Härten und anschließendes Mahlen der Mischung herstellen. Das Mahlgut wird, falls erforderlich, klassiert, um Füllstoff mit der gewünschten Korngrößenverteilung zu erhalten.Particulate materials suitable according to the invention as composite fillers Composite materials can be mixed, for example, by organic binder, filler and optionally polymerization initiator, Harden and then grind the mixture produce. The regrind is classified, if necessary Obtain filler with the desired grain size distribution.
Das Zerkleinern kann in herkömmlichen Mühlen erfolgen, beispielsweise in einer Kugelmühle, Luftstrahlmühle, Prallmühle oder Vibrationsmühle. Das Kompositmaterial kann vor dem eigentlichen Mahlen zum Beispiel in einem Kegelbrecher vorgebrochen werden.The grinding can take place in conventional mills, for example in a ball mill, air jet mill, impact mill or Vibration mill. The composite material can before the actual For example, grinding can be pre-broken in a cone crusher.
Die Ausführungsbeispiele zeigen, daß beim gewöhnlichen Mahlen von Kompositmaterialien ein erheblicher Anteil an feinpartikulärem Material mit einem Partikeldurchmesser von < 10 µm gebildet wird. Dieser wird erfindungsgemäß abgetrennt, beispielsweise durch Klassieren, wie Stromklassieren, Sichten, Windsichten, gegebenenfalls in Kombination mit elektrostatischen Verfahren, Flotation, Sedimentation, elektrostatische oder magnetische Trennung oder Sieben. Geeignete Verfahren werden in Ullmanns Encyklopädie der Technischen Chemie, Band 2 (1988), Unit Operations, beschrieben.The exemplary embodiments show that in the ordinary milling of Composite materials a significant proportion of fine particulate Material with a particle diameter of <10 microns is formed. According to the invention, this is separated off, for example by Classification, such as current classification, classifying, wind classifying, if necessary in combination with electrostatic processes, flotation, Sedimentation, electrostatic or magnetic separation or Seven. Suitable procedures are described in Ullmann's Encyclopedia Technical Chemistry, Volume 2 (1988), Unit Operations.
Als organisches Bindemittel zur Herstellung der partikulären
Komposite eignen sich alle durch Polymerisation härtbare
Bindemittel, insbesondere ethylenisch ungesättigte, polymerisierbare
Bindemittel, z.B. Monomere, wie monofunktionelle oder
polyfunktionelle Methacrylate, die allein oder in Mischungen
eingesetzt werden können. Als bevorzugte Beispiele für diese
Verbindungen kommen Methylmethacrylat, Isobutylmethacrylat,
Cyclohexylmethacrylat, Tetraethylenglycoldimethacrylat, Triethylenglycoldimethacrylat,
Diethylenglycoldimethacrylat, Ethylenglycoldimethacrylat,
Polyethylenglycoldimethacrylat, Butandioldimethacrylat,
Hexandioldimethacrylat, Decandioldimethacrylat,
Dodecandioldimethacrylat, Bisphenol-A-dimethacrylat, Trimethylolpropantrimethacrylat,
2,2-Bis-[4-(2-Hydroxy-3-methacryloxypropoxy)-phenyl]-propan
(Bis-GMA) sowie die Reaktionsprodukte aus
Isocyanaten, insbesondere Di- und/oder Triisocyanaten und
OH-gruppenhaltigen Methacrylaten in Frage. Beispiele dafür sind
die Umsetzungsprodukte von 1 Mol Hexamethylendiisocyanat mit 2
Mol 2-Hydroxyethylenmethacrylat, von 1 Mol Tri(6-isocyanatohexyl)biuret
mit 3 Mol 2-Hydroxyethylmethacrylat und von 1 Mol
2,2,4-Trimethylhexamethylendiisocyanat mit 2 Mol 2-Hydroxyethylmethacrylat,
die im folgenden als Urethandimethacrylate bezeichnet
werden. Der Bindemittelanteil bewegt sich zwischen 10 und 80
Gew.-% bezogen auf die Masse des Kompositmaterials, vorzugsweise
10 bis 30 Gew.-%.As an organic binder for the production of particulate
Composites are all suitable for curing by polymerization
Binder, especially ethylenically unsaturated, polymerizable
Binders, e.g. Monomers, such as monofunctional or
polyfunctional methacrylates, alone or in mixtures
can be used. As preferred examples of this
Compounds come methyl methacrylate, isobutyl methacrylate,
Cyclohexyl methacrylate, tetraethylene glycol dimethacrylate, triethylene glycol dimethacrylate,
Diethylene glycol dimethacrylate, ethylene glycol dimethacrylate,
Polyethylene glycol dimethacrylate, butanediol dimethacrylate,
Hexanediol dimethacrylate, decanediol dimethacrylate,
Dodecanediol dimethacrylate, bisphenol A dimethacrylate, trimethylolpropane trimethacrylate,
2,2-bis [4- (2-hydroxy-3-methacryloxypropoxy) phenyl] propane
(Bis-GMA) as well as the reaction products
Isocyanates, especially di- and / or triisocyanates and
OH group-containing methacrylates in question. Examples of this are
the reaction products of 1 mol of hexamethylene diisocyanate with 2
Moles of 2-hydroxyethylene methacrylate, from 1 mole of tri (6-isocyanatohexyl) biuret
with 3 moles of 2-hydroxyethyl methacrylate and 1
Besonders bevorzugte Monomere sind Urethandimethacrylat (UDMA), d.h. das Umsetzungsprodukt von 1 Mol 2,2,4-Trimethylhexamethylendiisocyanat mit 2 Mol 2-Hydroxyethylmethacrylat, 1,10-Decandioldi(meth)acrylat, Bisphenol-A-Dimethacrylat, ethoxyliertes Bisphenol-A-Dimethacrylat und Mischungen dieser Monomere.Particularly preferred monomers are urethane dimethacrylate (UDMA), i.e. the reaction product of 1 mole of 2,2,4-trimethylhexamethylene diisocyanate with 2 moles of 2-hydroxyethyl methacrylate, 1,10-decanediol di (meth) acrylate, Bisphenol A dimethacrylate, ethoxylated Bisphenol A dimethacrylate and mixtures of these monomers.
Zur Initiierung der Polymerisation enthalten die Mischungen einen Polymerisationsinitiator, beispielsweise einen Initiator für die radikalische Polymerisation. Je nach Art des verwendeten Initiators können die Mischungen kalt, durch Licht oder vorzugsweise heiß polymerisierbar sein.The mixtures contain one to initiate the polymerization Polymerization initiator, for example an initiator for the radical polymerization. Depending on the type of used Initiators can be cold, by light or preferably the mixtures be hot polymerizable.
Als Initiatoren für die Heißpolymerisation können die bekannten Peroxide wie Dibenzoylperoxid, Dilauroylperoxid, tert.-Butylperoctoat oder tert.-Butylperbenzoat eingesetzt werden, aber auch α,α'-Azo-bis(isobutyroethylester), Benzpinakol und 2,2'-Dimethylbenzpinakol sind geeignet. The known ones can be used as initiators for the hot polymerization Peroxides such as dibenzoyl peroxide, dilauroyl peroxide, tert-butyl peroctoate or tert-butyl perbenzoate can be used, but also α, α'-azo-bis (isobutyroethyl ester), benzpinacol and 2,2'-dimethylbenzpinacol are suitable.
Als Initiatoren für die Photopolymerisation können z.B. Benzophenon und seine Derivate sowie Benzoin und seine Derivate verwendet werden. Weitere bevorzugte Photoinitiatoren sind die α-Diketone, wie 9,10-Phenanthrenchinon, Diacetyl, Furil, Anisil, 4,4'-Dichlorbenzil und 4,4'-Dialkoxybenzil. Campherchinon wird besonders bevorzugt verwendet.As initiators for the photopolymerization e.g. benzophenone and its derivatives, as well as benzoin and its derivatives become. Other preferred photoinitiators are α-diketones, such as 9,10-phenanthrenequinone, diacetyl, furil, anisil, 4,4'-dichlorobenzil and 4,4'-dialkoxybenzil. Camphorquinone will used particularly preferably.
Als Initiator für die durch UV-Licht initiierte Polymerisation
eignet sich besonders 2,4,6-Trimethylbenzoyldiphenylphosphinoxid.
UV-Photoinitiatoren können allein, in Kombination mit einem
Initiator für sichtbares Licht, einem Initiator für die Kalthärtung
und/oder einem Initiator für die Heißhärtung eingesetzt
werden.As an initiator for the polymerization initiated by
Photoinitiatoren werden vorzugsweise zusammen mit einem Reduktionsmittel verwendet. Beispiele für Reduktionsmittel sind Amine wie Cyanethylmethylanilin, Triethylamin, Triethanolamin, N,N-Dimethylanilin, N-Methyldiphenylamin, N,N-Dimethyl-sym.-xylidin und N,N-3,5-Tetramethylanilin und 4-Dimethylaminobenzoesäureethylester.Photoinitiators are preferably used together with a reducing agent used. Examples of reducing agents are amines such as cyanoethylmethylaniline, triethylamine, triethanolamine, N, N-dimethylaniline, N-methyldiphenylamine, N, N-dimethyl-sym.-xylidine and N, N-3,5-tetramethylaniline and 4-dimethylaminobenzoic acid ethyl ester.
Als Initiatoren für die Kaltpolymerisation werden Radikale liefernde Systeme, z.B. Benzoyl- bzw. Lauroylperoxid zusammen mit Aminen wie N,N-Dimethyl-sym.-xylidin oder N,N-Dimethyl-p-toluidin verwendet. Es können auch dual härtende Systeme zur Katalyse verwendet werden, z.B. Photoinitiatoren mit Aminen und Peroxiden.Radicals are used as initiators for cold polymerization supplying systems, e.g. Benzoyl or Lauroyl peroxide together with Amines such as N, N-dimethyl-sym.-xylidine or N, N-dimethyl-p-toluidine used. There can also be dual curing systems for catalysis be used, e.g. Photoinitiators with amines and peroxides.
Die Initiatoren werden üblicherweise in einer Menge von 0,01 bis 5 Gew.-% bezogen auf die Gesamtmasse der Mischung verwendet.The initiators are usually used in an amount of 0.01 to 5 wt .-% based on the total mass of the mixture used.
Als anorganischer Füllstoff eignen sich besonders Quarz-, Glaskeramik-, Glaspulver oder Mischungen davon, vorzugsweise Glaspulver und ganz besonders bevorzugt Bariumglaspulver und/oder Strontiumglaspulver, wobei die mittlere Partikelgröße dieser Pulver vorzugsweise im Bereich von 0,4 bis 1,5 µm und insbesondere im Bereich von 0,7 bis 1,0 µm liegt. Quarz-, Glaskeramik- und/oder Glaspulver werden vorzugsweise in einer Menge von 10 bis 80 Gew.-%, insbesondere 40 bis 65 Gew.-% bezogen auf die Gesamtmasse der Mischung verwendet.Quartz, Glass ceramic, glass powder or mixtures thereof, preferably Glass powder and very particularly preferably barium glass powder and / or Strontium glass powder, the mean particle size of this Powder preferably in the range of 0.4 to 1.5 microns and in particular is in the range of 0.7 to 1.0 µm. Quartz, glass ceramic and / or glass powder are preferably used in an amount of 10 to 80 wt .-%, in particular 40 to 65 wt .-% based on the Total mass of the mixture used.
Darüber hinaus kann der Kompositfüller Füllstoffe zur Erzielung einer erhöhten Röntgenopazität enthalten. Die mittlere Partikelgröße des röntgenopaken Füllstoffs liegt vorzugsweise im Bereich von 100 bis 300 nm, insbesondere 180 bis 300 nm. Als röntgenopake Füllstoffe eignen sich z.B. die in der DE 35 02 594 A1 beschriebenen Fluoride der Seltenen Erdmetalle, d.h. die Trifluoride der Elemente 57 bis 71. Ein besonders bevorzugt verwendeter Füllstoff ist Ytterbiumfluorid, insbesondere Ytterbiumtrifluorid mit einer mittleren Partikelgröße von etwa 300 nm. Die Menge des röntgenopaken Füllstoffs beträgt vorzugsweise 10 bis 50 Gew.-%, besonders bevorzugt 20 bis 30 Gew.-%.In addition, the composite filler can be used to achieve fillers an increased radiopacity. The average particle size the radiopaque filler is preferably in the range from 100 to 300 nm, in particular 180 to 300 nm. As an X-ray opaque Fillers are suitable e.g. those described in DE 35 02 594 A1 Fluorides of rare earth metals, i.e. the trifluorides of elements 57 to 71. A particularly preferred one The filler is ytterbium fluoride, especially ytterbium trifluoride with an average particle size of about 300 nm. The amount of X-ray opaque filler is preferably 10 to 50% by weight, particularly preferably 20 to 30% by weight.
Außerdem können gefällte Mischoxide, wie beispielsweise ZrO2/SiO2, als Füllstoffe eingesetzt werden. Bevorzugt sind Mischoxide mit einer Partikelgröße von 200 bis 300 nm und insbesondere etwa 200 nm. Die Mischoxidpartikel sind vorzugsweise kugelförmig und weisen eine einheitliche Größe auf. Die Mischoxide haben vorzugsweise einen Brechungsindex von 1,52 bis 1,55. Die Mischoxide können als alleiniger Füllstoff oder in Kombination mit anderen Füllern eingesetzt werden. Das gefällte Mischoxid wird vorzugsweise in einer Menge von 20 bis 90 Gew.-%, besonders bevorzugt 25 bis 75 Gew.-% und ganz besonders bevorzugt 40 bis 75 Gew.-% verwendet.Precipitated mixed oxides, such as ZrO 2 / SiO 2 , can also be used as fillers. Mixed oxides with a particle size of 200 to 300 nm and in particular about 200 nm are preferred. The mixed oxide particles are preferably spherical and have a uniform size. The mixed oxides preferably have a refractive index of 1.52 to 1.55. The mixed oxides can be used as the sole filler or in combination with other fillers. The precipitated mixed oxide is preferably used in an amount of 20 to 90% by weight, particularly preferably 25 to 75% by weight and very particularly preferably 40 to 75% by weight.
Die Füllstoffe sind zur Verbesserung der Haftung zwischen Füllstoff und organischer Matrix bevorzugt silanisiert. Als Haftvermittler eignet sich besonders α-Methacryloxypropyltrimethoxysilan. Die Menge des eingesetzten Haftvermittlers richtet sich nach der Art und BET-Oberfläche des Füllstoffs.The fillers are used to improve adhesion between Filler and organic matrix preferably silanized. As an adhesion promoter α-methacryloxypropyltrimethoxysilane is particularly suitable. The amount of adhesion promoter used is determined according to the type and BET surface area of the filler.
Zusätzlich zu den bereits genannten Stoffen können die Mischungen Additive, wie Stabilisatoren und Polymerisationsinhibitoren enthalten. Diese werden bevorzugt in einer Menge von 0,01 bis 2 Gew.-% verwendet.In addition to the substances already mentioned, the mixtures Additives such as stabilizers and polymerization inhibitors contain. These are preferred in an amount of 0.01 to 2 % By weight used.
Die Gesamtmenge an anorganischem Füllstoff liegt vorzugsweise im Bereich von 20 bis 90 Gew.-%, insbesondere 60 bis 88 Gew.-% bezogen auf die Gesamtmasse des Kompositfüllers.The total amount of inorganic filler is preferably in Range from 20 to 90% by weight, in particular 60 to 88% by weight based on the total mass of the composite filler.
Eine bevorzugte Mischung zur Herstellung des Kompositfüllers
weist demnach folgende Zusammensetzung auf:
Als Füllstoff (c) enthält die Mischung vorzugsweise
Alle Angaben beziehen sich jeweils auf die Gesamtmasse der Mischung. Die Zusammensetzung kann eine der Komponenten (c1), (c2) oder (c3) oder eine Mischung daraus als Füller enthalten. Bevorzugt sind Zusammensetzungen, die einen Füllstoff des Typs (c1) enthalten, allein oder besonders bevorzugt im Kombination mit einer der Komponenten (c2) bis (c3).All information relates to the total mass of the Mixture. The composition can be one of the components (c1), (c2) or (c3) or a mixture thereof as a filler. Compositions containing a filler of the type are preferred (c1) contained, alone or particularly preferably in combination with one of the components (c2) to (c3).
Nach dem Härten, Mahlen und Klassieren werden die Kompositpartikel vorzugsweise mit einem geeigneten Haftvermittler behandelt. Dieser reagiert mit den freien Oberflächen des Füllstoffs der Kompositmaterials, die beim Mahlen des Komposits freigelegt werden, und verbessert so die Haftung zwischen Füllstoff und organischer Matrix. Als Haftvermittler sind die oben genannten Silane bevorzugt.After hardening, grinding and classifying, the composite particles preferably with a suitable adhesion promoter treated. This reacts with the free surfaces of the Filler of the composite material that occurs when grinding the composite are exposed, thus improving the liability between Filler and organic matrix. As an adhesion promoter they are preferred silanes mentioned above.
Die erfindungsgemäßen partikulären Kompositmaterialien eignen sich besonders als Füllstoffe für polymerisierbare Zusammensetzungen, d.h. Zusammensetzungen, die neben dem partikulären Kompositmaterial mindestens ein polymerisierbares Monomer und/oder Präpolymer und mindestens einen Polymerisationsinitiator enthalten. Der Anteil des partikulären Kompositmaterials liegt vorzugsweise im Bereich von 20 bis 90 Gew.-%, besonders bevorzugt 25 bis 70 Gew.-% und ganz besonders bevorzugt 30 bis 50 Gew.-%. Die Menge an organischem Bindemittel beträgt vorzugsweise 10 bis 80 Gew.-%, besonders bevorzugt 10 bis 30 Gew.-%, die Menge des Initiators 0,01 bis 5 Gew.-%, insbesondere 0,1 bis 1 Gew.-%.The particulate composite materials according to the invention are suitable are particularly suitable as fillers for polymerizable compositions, i.e. Compositions in addition to the particulate Composite material at least one polymerizable monomer and / or Prepolymer and at least one polymerization initiator contain. The proportion of the particulate composite material lies preferably in the range from 20 to 90% by weight, particularly preferably 25 to 70% by weight and very particularly preferably 30 to 50% by weight. The amount of organic binder is preferably 10 to 80 wt .-%, particularly preferably 10 to 30 wt .-%, the amount of Initiator 0.01 to 5 wt .-%, in particular 0.1 to 1 wt .-%.
Zur Herstellung polymerisierbarer Zusammensetzungen sind Kompositfüllstoffe mit einer Dichte von 1,5 bis 2,5 g/cm3, insbesondere 1,8 bis 2,2 g/cm3 bevorzugt. Die relativ geringe Dichte bedingt einen hohen Füllstoffvolumenanteil in der polymerisierbaren Zusammensetzung und bewirkt so eine zusätzliche Verringerung des Polymerisationsschrumpfes.For the production of polymerizable compositions, composite fillers with a density of 1.5 to 2.5 g / cm 3 , in particular 1.8 to 2.2 g / cm 3, are preferred. The relatively low density causes a high proportion of filler in the polymerizable composition and thus brings about an additional reduction in the polymerization shrinkage.
Neben dem Kompositfüller enthalten die polymerisierbaren Zusammensetzungen vorzugsweise zusätzlich weiteren partikulären anorganischen Füllstoff, insbesondere Quarz-, Glaskeramik-, Glaspulver oder Mischungen davon, besonders bevorzugt Glaspulver, ganz besonders bevorzugt Bariumglaspulver und/oder Strontiumglaspulver. Die mittlere Partikelgröße des Quarz-, Glaskeramik- und/oder Glaspulvers liegt vorzugsweise im Bereich von 0,4 bis 2 µm, besonders bevorzugt 0,4 bis 1,5 µm und ganz besonders bevorzugt 0,7 bis 1,0 µm. Der Anteil des Quarz-, Glaskeramik- und/oder Glaspulvers beträgt vorzugsweise 20 bis 70 Gew.-%, besonders bevorzugt 25 bis 50 Gew.-% und ganz besonders bevorzugt 30 bis 40 Gew.-% bezogen auf die Gesamtmasse der Zusammensetzung.In addition to the composite filler, the polymerizable contain Compositions preferably further additional particulate inorganic filler, in particular quartz, glass ceramic, glass powder or mixtures thereof, particularly preferably glass powder, very particularly preferably barium glass powder and / or strontium glass powder. The average particle size of the quartz, glass ceramic and / or glass powder is preferably in the range from 0.4 to 2 µm, particularly preferably 0.4 to 1.5 µm and very particularly preferably 0.7 to 1.0 µm. The share of quartz, glass ceramic and / or glass powder is preferably 20 to 70% by weight, particularly preferably 25 to 50% by weight and very particularly preferably 30 to 40 wt .-% based on the total mass of the composition.
Die Zusammensetzungen können darüber hinaus eines der oben genannten gefällten Mischoxide und/oder einen der oben genannten Füllstoffe zur Erhöhung der Röntgenopazität enthalten, wie beispielsweise Ytterbiumtrifluorid. Das Mischoxid wird vorzugweise in einer Menge von 20 bis 70 Gew.-% eingesetzt, der Anteil des röntgenopaken Füllstoffs liegt vorzugsweise im Bereich von 1 bis 10 Gew.-%, besonders bevorzugt von 1 bis 5 Gew.-%. Die Partikelgröße des röntgenopaken Füllstoffs liegt vorzugsweise im Bereich von 100 bis 300 nm, insbesondere 180 bis 300 nm. Bevorzugte Mischoxide sind gefällte SiO2/ZrO2-Mischoxide, die vorzugsweise eine Partikelgröße von 200 bis 300 nm und insbesondere etwa 200 nm aufweisen.The compositions can also contain one of the above-mentioned mixed oxides and / or one of the above-mentioned fillers for increasing the X-ray opacity, such as ytterbium trifluoride. The mixed oxide is preferably used in an amount of 20 to 70% by weight, the proportion of the radiopaque filler is preferably in the range from 1 to 10% by weight, particularly preferably from 1 to 5% by weight. The particle size of the X-ray opaque filler is preferably in the range from 100 to 300 nm, in particular 180 to 300 nm. Preferred mixed oxides are precipitated SiO 2 / ZrO 2 mixed oxides, which preferably have a particle size of 200 to 300 nm and in particular approximately 200 nm.
Darüber hinaus können die Zusammensetzungen zur Einstellung des rheologischen Verhaltens ein organisch modifiziertes Schichtsilikat enthalten. Das Schichtsilikat wird bevorzugt in einer Menge von 0,05 bis 5 Gew.-%, besonders bevorzugt 0,1 bis 1 Gew.-% eingesetzt. Die Summe der Anteile des röntgenopaken Füllers und des Schichtsilikats beträgt vorzugsweise maximal 5 Gew.-%.In addition, the compositions for adjusting the rheological behavior an organically modified layered silicate contain. The layered silicate is preferred in one Quantity from 0.05 to 5% by weight, particularly preferably 0.1 to 1% by weight used. The sum of the proportions of the radiopaque filler and the layered silicate is preferably at most 5% by weight.
Die Gesamtmenge des zusätzlichen anorganischen Füllstoffs der polymerisierbaren Zusammensetzung liegt vorzugsweise im Bereich von 0,05 bis 85 Gew.-%, insbesondere 0,1 bis 56 Gew.-%. Gemäß einer besonders bevorzugten Ausführungsform ist die polymerisierbare Zusammensetzung im wesentlichen frei von Füllstoff mit einer Partikelgröße von < 100 nm. Der anorganische Füllstoff ist vorzugsweise mit einem Haftvermittler behandelt, also beispielsweise silanisiert.The total amount of additional inorganic filler polymerizable composition is preferably in the range from 0.05 to 85% by weight, in particular 0.1 to 56% by weight. According to a particularly preferred embodiment is the polymerizable one Composition essentially free of filler with a Particle size of <100 nm. The inorganic filler is preferably treated with an adhesion promoter, for example silanized.
Außerdem können die polymerisierbaren Zusammensetzungen übliche Additive und Zuschlagstoffe enthalten, vorzugsweise in einer Menge von 0,01 bis 2 Gew.-%. In addition, the polymerizable compositions can be conventional Contain additives and additives, preferably in one Amount from 0.01 to 2% by weight.
Als organische Bindemittel, Polymerisationsinitiatoren, zusätzliche Füllstoffe und Additive eignen sich besonders die oben als Bestandteile des Kompositfüllers beschriebenen Substanzen. Bevorzugte Monomere zur Herstellung der polymerisierbaren Zusammensetzungen sind Benzylmethacrylat, ethoxyliertes Bisphenol-A-Dimethacrylat, Tetrahydrofurylmethacrylat und insbesondere Bisphenol-A-Dimethacrylat,ethoxyliertesBisphenol-A-Dimethacrylat gemäß der Formel (1) mit n = 1 und m = 2 und das Umsetzungsprodukt aus 2 mol Hydroxyethylmethacrylat (HEMA) und 1 mol Hexamethylendiisocyanat. Particularly suitable as organic binders, polymerization initiators, additional fillers and additives are the substances described above as components of the composite filler. Preferred monomers for the preparation of the polymerizable compositions are benzyl methacrylate, ethoxylated bisphenol A dimethacrylate, tetrahydrofuryl methacrylate and in particular bisphenol A dimethacrylate, ethoxylated bisphenol A dimethacrylate according to formula (1) with n = 1 and m = 2 and the reaction product from 2 mol of hydroxyethyl methacrylate (HEMA) and 1 mol of hexamethylene diisocyanate.
Als Additive kommen zusätzlich zu den oben genannten Materialien Beschleuniger, Farbstoffe, Pigmente, UV-Absorber, optische Aufheller und Gleitmittel in Betracht. Zusammensetzungen, die einen Photoinitiator enthalten, sind bevorzugt.Additives come in addition to the above materials Accelerators, dyes, pigments, UV absorbers, optical Brightener and lubricant into consideration. Compositions that contain a photoinitiator are preferred.
Die erfindungsgemäßen polymerisierbaren Zusammensetzungen setzen
sich vorzugsweise wie folgt zusammen:
Die polymerisierbaren Zusammensetzungen eignen sich besonders als Dentalmaterialien. Unter dem Begriff Dentalmaterial werden Zahnfüllungsmaterialien, Materialien für Inlays oder Onlays, Zahnzemente, Verblendmaterialien für Kronen und Brücken, Materialien für künstliche Zähne oder sonstige Materialien für die prothetische, konservierende und präventive Zahnheilkunde verstanden.The polymerizable compositions are particularly suitable as Dental materials. Under the term dental material Dental filling materials, materials for inlays or onlays, Dental cements, veneering materials for crowns and bridges, Materials for artificial teeth or other materials for prosthetic, preservative and preventive dentistry Roger that.
Vorzugsweise dient der erfindungsgemäße Dentalwerkstoff als Zahnfüllungsmaterial. Zahnfüllungsmaterialien werden auch als Zweikomponentenmaterialien hergestellt, die nach dem Anmischen kalt aushärten. Die Zusammensetzung ist ähnlich wie bei den lichthärtenden Materialien, nur wird anstatt der Photokatalysatoren in die eine Paste z.B. Benzoylperoxid und in die andere Paste z.B. N,N-Dimethyl-p-toluidin eingearbeitet. Durch Vermischen etwa gleicher Teile der beiden Pasten erhält man ein Zahnfüllungsmaterial, welches in wenigen Minuten aushärtet.The dental material according to the invention preferably serves as Dental filling material. Tooth filling materials are also called Two-component materials made after mixing harden cold. The composition is similar to that of the light-curing materials, only instead of the photocatalysts into which a paste e.g. Benzoyl peroxide and in the other paste e.g. N, N-dimethyl-p-toluidine incorporated. By mixing, for example the same parts of the two pastes are obtained with a filling material, which hardens in a few minutes.
Wenn man bei den letztgenannten Materialien das Amin wegläßt und als Katalysator z.B. nur Benzoylperoxid verwendet, erhält man einen heißhärtenden Dentalwerkstoff, der für die Herstellung eines Inlays bzw. von künstlichen Zähnen verwendet werden kann. Für die Herstellung eines Inlays wird im Mund des Patienten von der Kavität ein Abdruck genommen und ein Gipsmodell hergestellt. In die Kavität des Gipsmodells wird die Paste eingebracht und das Ganze wird in einem Drucktopf unter Hitze polymerisiert. Das Inlay wird entnommen, bearbeitet und dann im Munde des Patienten in die Kavität einzementiert. If you leave out the amine in the latter materials and as a catalyst e.g. only benzoyl peroxide used is obtained a thermosetting dental material that is used for manufacturing an inlay or artificial teeth can be used. For the production of an inlay, in the patient's mouth is from an impression was taken from the cavity and a plaster model was made. The paste is placed in the cavity of the plaster model and that The whole is polymerized in a pressure pot under heat. The Inlay is removed, processed and then in the patient's mouth cemented into the cavity.
Die Erfindung bezieht sich nicht nur auf den Dentalwerkstoff, sondern auch auf daraus hergestellte Fertigteile, z.B. künstliche Zähne, Schalen, Inlays etc.The invention relates not only to the dental material, but also on finished parts, e.g. artificial Teeth, shells, inlays etc.
Nachfolgend wird die Erfindung anhand von Beispielen näher erläutert.The invention is explained in more detail below with the aid of examples.
Zur Herstellung eines partikulären Kompositmaterials wurden die
folgenden Komponenten in den angegebenen Mengen miteinander
gemischt, und die Mischung bei 100 °C für 24 Stunden ausgehärtet,
dann grob zerschlagen und anschließend in einer Kugelmühle
gemahlen. Die mittlere Korngröße betrug 21 µm. Anschließend wurde
der Feinanteil (< 10µm) und der Grobanteil (> 70 µm) mittels
Sichter entfernt. Durch das Sichten verschiebt sich die mittlere
Partikelgröße auf 37 µm. Die Korngrößenverteilung vor dem Sichten
ist in Abbildung 1, die Korngrößenverteilung nach dem Sichten in
Abbildung 2 gezeigt. Anschließend wurde die Hälfte des Materials
mit 5 Gew.-% Methacryloxypropyltrimethoxysilan und 2 Gew.-% in
Wasser silanisiert.
(mittlere Partikelgröße 1,0 µm)
(average particle size 1.0 µm)
39,5 Gew.-% des partikulären Kompositmaterials gemäß Beispiel 1
wurden mit 39,5 Gew.-% Bariumglaspulver mit einer mittleren
Teilchengröße von 1,5 µm, 15,5 Gew.-% einer Monomermischung mit
der unten angegebenen Zusammensetzung und 2,5 Gew.-% einer
Bentonepaste zu einer homogenen Paste gemischt. Die Bentonepaste
setzt sich aus 12,5 Gew.-% Bentone (Schichtsilikat) und 87,5
Gew.-% der Monomermischung zusammen. Zur Bestimmung des Polymerisationsschrumpfes
mittels Dilatometer wurden 0,1 g der Paste auf
einem Glasplättchen fixiert, mit Quecksilber überschichtet und
ein Wegaufnehmer schwimmend auf dem Quecksilber plaziert. Die
Paste wurde durch das Glasplättchen hindurch mit einem Lichtpolymerisationsgerät
(500 mW/cm2) für 60 Sekunden belichtet. Es
wurde ein Polymerisationsschrumpf von 1,6 % gemessen.
(mittlere Partikelgröße 1,5 µm)
(12,5 Gew.-% dispergiert in Monomermischung)
(average particle size 1.5 µm)
(12.5% by weight dispersed in a monomer mixture)
Es wurde analog zu Beispiel 2 ein lichthärtendes Dentalmaterial auf der Basis des Füllers gemäß Beispiel 1 hergestellt, der Füller jedoch nicht durch Sichten vom Fein- und Grobanteil befreit. Es wurde Füller der gleichen Charge verwendet. Der Polymerisationsschrumpf betrug 1,9 %.It became analogous to Example 2, a light-curing dental material based on the filler according to Example 1, the However, the filler cannot be viewed through fine and coarse parts freed. Filler from the same batch was used. The Polymerization shrinkage was 1.9%.
Claims (27)
Applications Claiming Priority (2)
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DE2001108261 DE10108261B4 (en) | 2001-02-21 | 2001-02-21 | Polymerizable composition with particulate composite based filler |
DE10108261 | 2001-02-21 |
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EP1234567A3 EP1234567A3 (en) | 2002-11-06 |
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US (1) | US7091258B2 (en) |
EP (1) | EP1234567B1 (en) |
JP (1) | JP3683861B2 (en) |
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Also Published As
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JP2002256010A (en) | 2002-09-11 |
DE50209886D1 (en) | 2007-05-24 |
EP1234567A3 (en) | 2002-11-06 |
EP1234567B1 (en) | 2007-04-11 |
CA2372775A1 (en) | 2002-08-21 |
JP3683861B2 (en) | 2005-08-17 |
DE10108261B4 (en) | 2006-07-20 |
US7091258B2 (en) | 2006-08-15 |
ATE359054T1 (en) | 2007-05-15 |
DE10108261A1 (en) | 2002-09-12 |
US20020152930A1 (en) | 2002-10-24 |
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